Improved machine for tempering saw-plates



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Z e o o o o o i Z. .K o o o o o a d OU D1 o .05o 02o o .M www o NNNo A. o o 4 .Z o O A o o DE W 4 .o o o o o o Q a j u w. A l s @Eighth gisten @einer @fifth A. J. ROCKAFELLOW, 0F S '.l. LOUIS, MISSUURI. Letters .Patentlva 71,330, dated November-26,1867; miledated Noziember `8, 1867.1

IMPROVBD MACHINE FOB. TEMP-BRING SAW-PLATTE.`

TO ALL WI-IOM IT MAY CONCERN:

Be it known that I, A. J. ROCKAELLOW, of St. Louis, in. the county of iSt. Louis, and `Stateof Missouri,l

have invented a new and useful Machine'fer Tcmpering SawPlates and other thin platcsptsteel g and I do hereby declare that the following is a' full and clear description thereof, reference being hadltojthegaccompahying drawings, and to the letters of reference marked thereon. i

Figure 1 ofthe drawings is aside elcvution'ot` one ofthe improved machines.

Figure 2 is a pla-n ofit.

Figure 3 is a longitudinal sectional elevation, taken on the lnc g/ z'in iig. 2.

This invention relates, firstly, to the construction of the carriageand its cap, which hold the pieces to be tempered in a perfectly true position while being hardened or tempered; secondly, to the device for setting the cap at such a distance from the `carriage as te enable it to `hold any plate, whether thick or.thin,.in`the desired` position; thirdly, to the arrangements for loweringthe cap-plate upon-the carriage andconining it in the required relative position to thesaid carriage; and, fourthly, to the arrangement for lowering the carriage into the bath-tub in such a position as to make it strike the oil or other tempering-Huid squarely, thereby tempering i the plates evenly throughout.

To enable those skilled 'in the art to make and usemy improved machine, I will proceed to describciits construction and operation. I v A is the bath-tub, into which the plates are te be plunged for the purpose of tempering them. Bis the carriage, upon which the plates are to be placed, and where they are to be secured by means of the cap Bfbefore and during the operation ot" tempering. The carriage B is attached to the sides of the bath-tub means ot'` four or more parallel links, a, which are pivotcd Ato the curb at al, and to the carriage at ai. When the carriage israised up to the top of the curb of the hath-tub, as shown in iig. 3, preparatory to` receiving the plates` to `be `tempereeht will rest on the links a, which will standwith their Vtop ends inclining a little backward, as also shown in g. 3. 4 The interior length of the hath-tuhwill be longer than the carriage by asmuch as thelenlgth` of the links cl., so that when the carriage drops down to the position shown by red lines in iig. 3, there will be roo1n` i Venough for it to drop inside of the tub; and in ohangingfrom the upper to the lower position, the top ends of Vthe links a will describe an arc of a circle drawn-from the centre al. On-either side ofthe carriage there is a cord, rope, or chain, I), attached to it at b1, and passing `thence over the sheaves b2 bs down to theraising-shaft b4, to which their other ends are attached. When the carriage is downin the bottomof the bath-tub, in 'the position shown by red lines in ig. 3, the cord or chain ZJ will, if tightened up by turning the crank 65.0f the shaft 6*,.bedrawn from its points 111 up toward the sheaves b in such a position as to raise the carriage up into its links a, as shown in the full lines of g. 3. When it is desired to drop the carriage down into the bath,` all that it will be necessary to do will be to unloose the pawl b6 from its hold on the ratchet on the end of the shaft b, when `the weight of the carriage resting on the inclined legs or links a will drop down by means of its own. weight into the bathtub; for as soon as' the cord or chain b is loosened from holding the carriage up, the back` ward inclination of the legs or links, already alluded to, will causo the carriage to drop back anddown as `above described, and the two 'ends of the carriage being held up and supported by the links or legs a, it will retainl a i. horizontal position throughoutits journey from its upward station to its lower one, and this is a very importantv consideration; for the plates `to be tempered'will by this arrangement be forced to strike the tempering-Huid evenly, and in a glancing manner, and the plates will therefore be tempered uniformly throughout, and the descending plate will strike the top of the tluid in the bath in such a glancing manner as not` to impede the downward motion ofthe plates therein. This same glancing, lowering motion of the carriage might be accomplished by arranging two inclined ways or tracks on the sides of the bath-tub and fitting sheavcsunder the carriage to run thereon, care being taken to raise one end of'the carriage higher 'on the sheaves than `the other, to y .compensate for the lowering of the ways on that end, and to keep the carriage level. On the back end of the carriage there are two posts, 1) erected, and placed between these and hinged to them is the capv B` as clearly shown in the drawings. On the forward end ofthe cap there are two similar posts, 6 and between these'is the rocking-bar`d, which finds its bearings in the said posts b, by means of' journals passing through them. The

` journals of this roeking-bnr, and thejournals by means of which the cap Bis --hinged to thezposts 6 are inode" to pass entirely through the said posts, and are permitted to play up and down therein. The outer ends of allv of these Ijournals are made to extend through the slots c in the setting-guides C, andare provided with the thumb-screwnuts'c, which may be set up tightly to the guides, for the purpose hereinafter described. The setting-guides C are hinged or pivoted to the tops of the posts b1 and 152 at x, so that their bottom ends mayhave a swinging or.` pendulous tn otionlongiturlinally.l About khalt` way down the length of these guides are set-screws c, which work Vthrough segmental slots-in said guides, the said-,slots being dra-wn from the centres z. The slots c are made straight, and lower at one end than at the other, and by swinging them to one side or the other, the

journals which pass through them will beuaisedup or lowered downin the slots in the posts bl and b2 through which they pass, and the cap B' and the rocking-bar d maybe raised up or lowered down by simply changing the setting-guides from one side to the' other, andthe cap may in thismanner be set at any required distance from the carriage, according to-the thickness of the plates that it is desired to handle, and when once set for any particular thickness offplates, they may be confnedin that position so long as necessary by simply tight` enin-g up the thumb-screws c1 e. The top sido of the carriage andthe bottom side of itscovering cap should be studded with pyramidal studs, e, so arranged that when the cap is closed down upon the carriage the points of its studs will fall directly above the points of the lower studs, and between these two sets -of points the plates to be tempered will be firmly and truly held. These studs should be siteh a 'distance' apart as to` e'nable the 'oil or other tempering-fluid to pass easily between them and reach every point in the plate that is being tem-l pered. Both the carriage and cap pieces should be perforated with numerous holes, for the purpose of allowing the tempering-duid to pass freely through. The rocking-bar d has a'hook, d1, projecting from its lower side, 4so as to hook under the bottom of the' carriage when the cap is down, and hold the two together. The top ofthe hook-piece d extends above the bar, and forms au abutment for the spring liz to rest against, in order to secure the hook under thecarriage, and also forms a` hand-piece, by means of which the operatormaydisengagel the hook from its hold und'erethe carriage when the cap is to be raised up. Y On lthe back end of the bath-tub the frame D is erected, for the purpose of furnishing a bearing for the counterpoising rope E. This rope is attached to the cap B' near itsv forward end, and thene'e passing up over a sheave in the top ofthe frame D, and -down to aweigh'c, E'. When the cap is to be raised up, this weight will nearly counterbalance the weight ofthe cap B', and will assist greatly in raising it. It will also act beneficially on the carriage tov assist in-pulling it back into the bath-tub when the strain from the shaft b" is withdrawn from it; The ways Il are designed to lead from thev furnaccwh'en the plates are heated to the carriage onvwhich they are tempered, and the plates may be slid along on top of these ways quite easily. i

Having described my invention, what I claim, is-

1. The construction and arrangement of the carriage B, and its cap B', substantially as herein described and set forth. Y*

2. I claim the setting-guides C, and in combination with these the'setsere\vs el, for the purpose'ot` adjusting the distance between the cap and carriage to any required thickness of plates. l

3. I claim the cap B', in combination with therockingbar d, and also with the rope and weight E and E', substantially as described and set forth. i i l i 4. I claini the carriage B, when combined with the links a and the cord or chain b and raising-shaft b, or equivalent devices, whereby the carriage may heV moved down into and up out of the bath-tub in a diagonal Y direc'ton, and still retain its horizontal position, substantially as described andset forth.

A. J. ROCKAFELL'OW.

Witnesses: i

S. M. RANDOLPH, M. RANDOLPH. 

